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Solnce55 [7]
3 years ago
5

Solve the equation by factoring.

Mathematics
2 answers:
Delicious77 [7]3 years ago
6 0

Factorizing an expression involves writing the expression in simpler forms

The values of z are z = \frac 15 or z=4

The equation is given as:

5z^2 - 21z + 4 = 0

Expand the equation

5z^2 - 20z -z + 4 = 0

Factorize the expression:

5z(z - 4) -1(z - 4) = 0

Factor out z - 4

(5z - 1)(z - 4) = 0

Split

5z -1 = 0 or z - 4 = 0

Solve for z

z = \frac 15 or z=4

Hence, the values of z are z = \frac 15 or z=4

Read more about factorization at:

brainly.com/question/11579257

makvit [3.9K]3 years ago
6 0

I would say the answer would be D by my calculations if I'm wrong I will come back and update

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What ratio is proportional to 18/21
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Answer:

There are many.

Step-by-step explanation:

When you say proportional, you are looking for a ratio that is equivalent to the ratio given. In your case, there are many so you might need to be more specific. But still, we can help you figure it out.

An easy way to do this would be to scale it down to its simplest form and then move upwards. To find proportional ratios, just multiply denominator and the denominator with the same factor.

\dfrac{18}{21} = \dfrac{6}{7}

That is your ratio in its simplest form. Now we can scale up, I'll show you how to do one completely:

\dfrac{6}{7} x \dfrac{2}{2} = \dfrac{12}{14}

That's the same ratio scaled up by a factor of 2.

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\dfrac{6}{7} x \dfrac{3}{3} = \dfrac{18}{21}

That's the ratio given

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\dfrac{6}{7} x \dfrac{4}{4} = \dfrac{24}{28}

Scaled up by a factor of 4

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\dfrac{6}{7} x \dfrac{5}{5} = \dfrac{30}{35}

Scaled up by a factor of 5.

The list goes on and on.


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3 years ago
Help! With Fraction Problems??? Hailey is knitting a scarf. Each half hour, she adds 3/7 inch to the scarf's length. How much le
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A ladder is placed against the side of a house. The top of the ladder is 12 feet above the ground. The base of the ladder is 5 f
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The equation would be
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poizon [28]

Answer:

9 & 1/4

Step-by-step explanation:

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7 0
3 years ago
Read 2 more answers
Find all natural values of x such that x/8 is a proper fraction, and x/4 is an improper fraction.
Roman55 [17]

Answer:

5, 6 and 7.

Step-by-step explanation:

5/8 is proper  while 5/4 is improper

6/8 is proper while 6/4 is improper  

7/8 is proper while 7/4 is improper

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3 years ago
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